Gaging-dies for rock-drills.



0. BROWN. GAGING DIES FOR ROCK DRILLS. APPLICATION FILED AUG. 2, 1909.

1,053,474. Patented Feb. 18, 1913.

2 SHEETS-SHEET 1.

WITNESSES- w INVENTOR.

A TTORNE Y.

COLUMBIA PLANOuiiAPI-l 60.,WA5MINGTON. 11.0.

Patented Feb. 18, 1913.

2 SHEETSSHEET 2. 2725-2 5.

0. BROWN.

GAGING DIES FOR ROCK DRILLS.

APPLICATION FILED AUG. 2, 1909.

' INVENTOR.

CA/Pz, fire/1014 ATTORNEY.

WITNESSES UNITED STATES PATENT OFFICE.

CARL BROWN, OF DENVER, COLORADO, ASSIGNOR TO THE CHAMPION EORGINGMACHINE COMPANY, OF DENVER, COLORADO, A CORPORATION OF COLORADO.

To all whom it may concern:

Be it known that I, CARL BROWN, a citizen of the United States, residingin the city and county of Denver and the State of Colorado, haveinvented new anduseful Improvements in Gaging-Dies for Rock-Drills, ofwhich the following, together with the accompanying drawings, constitutea full, clear, and exact specification.

This invention relates to dies for gaging the cruciform drill bits usedin rock drilling, to uniform sizes. The said dies are intended to befurnished principally with the machine for making and sharpening rockdrills and for general forging, upon which I have filed an applicationfor U. S. Patent Serial No. 510,950 bearing even date herewit The objectof the present invention is to provide a tool for gaging the thicknessof the wings of rock drills and the amount of spread thereof, to suchuniform dimensions as may be desired, and to accomplish this morequickly and efficiently than is done at present.

A further object is to eliminate skilled hand labor in this step ofdrill making.

While the primary purpose is to use this invention in connection withthe machine referred to, yet these dies may be mounted in an individualframework and used separately in cases where this may seem desirable.

The present drawings show these dies as forming a part of the machineabove mentioned but any skilled designer of machinery can readily seehowto construct a simple individual framework containing the necessaryelements for a separate machine.

In the accompanying drawings, Figure 1 is a front elevation of the diesin working position. Fig. 2 is a section taken on the lines 22, (Fig. 1)and Fig. 3 is an elevation taken from the lines 33, (Fig. 2) and in thedirection indicated by the arrows.

The steel of which the drill is being made comes to these dies afterhaving been operated upon by the opening dies, as ex-' plained in theapplication for U. S. patent already named.

Referring to the drawings, (3*) and (3 are parts of the tool wheel disksof my machine, the sleeves (3) and (3) extend- Specification of LettersPatent.

Application filed August 2, 1909.

Patented Feb.'18,1913. Serial No. 510,949.

ing outward respectively from (3 and (3 The block (15) forms therelatively stationary'part of the dies and (15 is the relatively movablepart. (15 is secured in the sleeve (3) by pins (8 In constructing anindividual machine, the parts (8 and (3?) would form a portion of theframework of the machine and these two parts would, of course, berigidly connected to each other so as to allow the proper working of thedies. The movable part (15**) of the dies is held normally in theretracted position by the spring (6), which is in compression betweenthe pins (3 and (15 A tapering stop (20), which is adjustable back andforth and having an L-shaped cross section, is slidably disposed in acorresponding groove formed in the front face of block (15 A straightbar (21), having a foot (21 the latter carrying the upright stop (21 isconnected to (20) at the latters lowermost extremity by the bolt end(20") passing through an elongated eye (21) in the extremity of (21 Bar(21) slides over the face of (3 in the guides (23) and may be adjustablyheld in a number of different positions by the pin (24) attached to thespring handle (24) and engaging various corresponding holes (25),arranged on the face of (3 15*) and (15 have the tapering recesses 15),(15 respectively, cut in their 0pposing faces. The taper of theserecesses corresponds to the taper desired on the sides on the drillwings. The drill wings are flattened out between the opposing faces of(15 and (15 and the thickness "of the drill Wings is determined byposition of the adjustable-stop (20) which limits the distance ofapproach between (15) and (15 the latter at the same time gaging theamount of spread of the wings. By moving the bar (21) back and forth,the depth stop (21) is moved back and forth to the corresponding degreein the recess (15*), and the lateral stop (20) is moved in or out in thesame proportion. It will be noticed that the same ratio will constantlyexist between the depth to which the drill is admitted into the dies andthe distance to which the stop (20) projects from the face of (15).

(28), (28), are arms extending from the engagement with the twoextremities of pin (15 operating lever (27), is rigidly attachedto' theshaft (26) at any convenient point. The position of (27 at'the otherextremity of its stroke is shown in dotted lines. The purpose of thedevice'just' explained is to retract (15) in case the spring pressureshould, at an'y time, be ins'ufii'c'ient to accomplish this. V I

' In using the dies, the adjustable stops are first brought to thedesired positions by means of .the spring-handle (24) and pin (24)engaging one of the corresponding holes (25). Thedrill steel is insertedinto the dies from the front and the depth to which it is admitted isdetermined by the stop; (21 The hammer (5) is then allowed to strike (15forcing it forward against the drill-steel until it is stopped by (20),thus flattening out two of the wings of the drill to the required gage,and at the same time, drawing down the amount of spread of the oppositewings to the corresponding gage. The drill steel is then withdrawn fromthe dies and turned through an angle of 90 degrees and again insertedinto the dies" as before, when the hammer is allowed to strike (15 asbefore, thus gaging the thickness of the second pair of wings and gagingthe amount of spread of the first pair. An anvilblock (9), back of thestationary die, is provided for taking. up the shock produced by thestriking of the hammer (5).

wedge, suitably disposed in one of the said principal parts, the saidslidable wedge be ing adapted to be drawn back and forth, and thereby tovariably limit the distance of ap ,proach toward each other of the twosaid principal members substantially as, and for the purpose, described.

2. In gaging dies for rock drills, the combination with two principalforming members, of a suitably disposed slidable wedge in engagementwith one of the said principal members; a spring handle slidablyarranged on the same principal member; a slotted foot projecting fromthe said spring handle and engaging one extremity of the said slidable'wedge; a depth gage mounted on the said projecting foot, and means-forrigidly holding the said spr ng handle in any one of severalpredetermlned different positions, as,

and for the purpose specified.

In testimony whereof, I have signed my name to this specification in thepresence oftwo subscribing witnesses.

CARL BROWN.

Witnesses:

I. H. MALLINOKRODT, IDA B. HAWLEY.

Copies ofthis patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. 0.

